Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. sound device components
7. aerophone components

Narrower term/s

• bocals (crooks)

Anotations

Scope note:

Detachable lengths of tubing inserted into aerophones, either permanently or for a specific playing occasion, for the purpose of either changing the sounding tube length, or to carry the mouthpiece where it is within easier reach of the player.